Desktop: Focus app window when loading a document (#4124)

editor/src/messages/app_window/app_window_message.rs

@@ -11,6 +11,7 @@ pub enum AppWindowMessage {
 	Maximize,
 	Fullscreen,
 	Drag,
+	Focus,
 	Hide,
 	HideOthers,
 	ShowAll,

editor/src/messages/app_window/app_window_message_handler.rs

@@ -36,6 +36,10 @@ impl MessageHandler<AppWindowMessage, ()> for AppWindowMessageHandler {
 				#[cfg(not(target_family = "wasm"))]
 				responses.add(FrontendMessage::WindowDrag);
 			}
+			AppWindowMessage::Focus => {
+				#[cfg(not(target_family = "wasm"))]
+				responses.add(FrontendMessage::WindowFocus);
+			}
 			AppWindowMessage::Hide => {
 				#[cfg(not(target_family = "wasm"))]
 				responses.add(FrontendMessage::WindowHide);

editor/src/messages/frontend/frontend_message.rs

@@ -362,6 +362,8 @@ pub enum FrontendMessage {
 	#[cfg(not(target_family = "wasm"))]
 	WindowHide,
 	#[cfg(not(target_family = "wasm"))]
+	WindowFocus,
+	#[cfg(not(target_family = "wasm"))]
 	WindowHideOthers,
 	#[cfg(not(target_family = "wasm"))]
 	WindowShowAll,

editor/src/messages/portfolio/portfolio_message_handler.rs

@@ -819,6 +819,8 @@ impl MessageHandler<PortfolioMessage, PortfolioMessageContext<'_>> for Portfolio
 
 				// Load the document into the portfolio so it opens in the editor
 				self.load_document(document, document_id, responses);
+
+				responses.add(AppWindowMessage::Focus);
 			}
 			PortfolioMessage::OpenImage { name, image } => {
 				// `NewDocumentWithName`'s handler routes empty/None-equivalent names through `resolve_document_name` which assigns the next available "Untitled Document {N}".